You infer that the older C130 models took bleed air from No 1 engine only... not so. The tail, or empenage, de-ice air was taken from the centre manifold duct. Any engine could supply air to the centre manifold. I've no reason to believe that the J was any different.
The left and right wing de-ice was taken from each respective wing duct. Providing that the wing isolation valves wern't closed, any engine could supply left and right wing anti-ice systems. However, bleed air management must be carefully monitored with one or more engine bleed valves closed.
If a wing isolation valve has been closed (for whatever reason), then the adjacent engine bleed valves would also be closed (maybe to isolate a leak). In this instance, the adjacent wing anti-ice air would not be available to the adjacent wing. With one wing air system shut down, it wouldn't be appropriate to attempt to de-ice the other wing on its own!